Replace Batteries

Keypad Battery Replacement

For the keypads, the batteries need to be replaced when the unit indicates a low battery, or, sometimes, when it's noticed that a keypad is less responsive than usual. 

1. Remove the small phillips screw on the bottom of the keypad
2. Slide the keypad up in the holder, about half an inch
3. Replace 4 AA cell batteries

Door Sensor Battery Replacement

The alarm master system should indicate when a battery voltage is low, and when a battery has failed.

1. Remove the cover at the bottom of the sensor.  This has a slot on the bottom which permits prying with a small screwdriver
2. Remove the small phillips screw at the bottom of the sensor
3. Replace the battery with a CR123 3volt battery
4. Replace all covers